DE102009050917B3 - Doctor blade of a dosing system for distributing and stripping a fluid or viscous medium on running material web such as paper or cardboard web, where the fluid or viscous medium is applied in excess and is removed by the doctor blade - Google Patents

Doctor blade of a dosing system for distributing and stripping a fluid or viscous medium on running material web such as paper or cardboard web, where the fluid or viscous medium is applied in excess and is removed by the doctor blade Download PDF

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Publication number
DE102009050917B3
DE102009050917B3 DE102009050917A DE102009050917A DE102009050917B3 DE 102009050917 B3 DE102009050917 B3 DE 102009050917B3 DE 102009050917 A DE102009050917 A DE 102009050917A DE 102009050917 A DE102009050917 A DE 102009050917A DE 102009050917 B3 DE102009050917 B3 DE 102009050917B3
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DE
Germany
Prior art keywords
lips
rod according
doctor blade
doctor
viscous medium
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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DE102009050917A
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German (de)
Inventor
Michael Dr.-Ing. Hagedorn
Heiko Dodt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Salzgitter Mannesmann Prazisrohr GmbH
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Salzgitter Mannesmann Prazisrohr GmbH
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Priority to DE102009050917A priority Critical patent/DE102009050917B3/en
Application granted granted Critical
Publication of DE102009050917B3 publication Critical patent/DE102009050917B3/en
Priority to EP20100075712 priority patent/EP2314382A3/en
Priority to US12/910,135 priority patent/US20110265712A1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
    • B05C11/045—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades characterised by the blades themselves
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D21H25/12—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
    • B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod

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  • Coating Apparatus (AREA)
  • Paper (AREA)

Abstract

The doctor blade of a dosing system for distributing and stripping a fluid or viscous medium on running material web such as paper or cardboard web, where the fluid or viscous medium is applied in excess and is removed by the doctor blade from the desired stroke weight is claimed. The doctor blade is a cold drawn profile tube (10) that is equipped at its external circumference (12) with two axially parallel, molded lips (11), which have a thickness increasingly enlarging from external circumference of the tube, where the thickness is reverted radially to external circumference of the tube. The doctor blade of a dosing system for distributing and stripping a fluid or viscous medium on running material web such as paper or cardboard web, where the fluid or viscous medium is applied in excess and is removed by the doctor blade from the desired stroke weight is claimed. The doctor blade is a cold drawn profile tube (10) that is equipped at its external circumference (12) with two axially parallel, molded lips (11), which have a thickness increasingly enlarging from external circumference of the tube, where the thickness is reverted radially to external circumference of the tube. The tear-off edges of the lips lie related to the external circumference. The lips are distributed over the external circumference and arranged symmetrically to each other or asymmetrically on the profile tube. A high-strength layer (15) reducing the friction is applied on the surface of the lips and is a diamond-like-carbon coating based on carbon. The number of lips is dependent upon the running speed of the paper or cardboard web to be coated and the layer thickness applied on the paper- and cardboard web. The interior diameter (16) of the profile tube is circular and is formed like the external profile.

Description

Die vorliegende Erfindung betrifft eine Rakelstange für Dosiersysteme zum Verteilen und Abstreifen eines flüssigen oder viskosen Mediums auf laufenden Materialbahnen, insbesondere auf Papier- und Kartonbahnen, bei denen das flüssige oder viskose Medium im Überschuss aufgetragen und mittels der Rakelstange auf das gewünschte Strichgewicht abgerakelt wird.The The present invention relates to a metering rod for metering systems for distributing and stripping a liquid or viscous medium on moving webs, especially on paper and board webs, where the liquid or viscous medium in excess applied and by means of the doctor bar to the desired coating weight is doctored off.

In der Papier- und Kartondruckindustrie gibt es Andrückkörper, die gegen die schnell laufenden Papier- und Kartonagebänder drücken und die gleichzeitig die aufzubringenden Farben gleichmäßig auf dem Karton verteilen und abstreifen. Sie bestehen üblicherweise aus einem Rohr, das radial außen in Längsrichtung mit einer entsprechenden Kunststofflippe versehen ist. Auch sind beschichtete Halter und Stangen für Stangenstreichvorrichtungen bekannt.In There are Andrückkörper the paper and cardboard printing industry, the Press against the fast moving paper and cardboard bands and at the same time the applied colors evenly distribute the cardboard and strip. They usually exist from a tube that is radially outside in the longitudinal direction with a corresponding plastic lip is provided. Also are coated Holders and rods for Bar coater known.

In der DE 696 03 969 T2 ist ein Stabrakelhalter beschrieben, der als Gehäuse ausgebildet ist, und in das ein zylindrischer Stabrakel einführbar ist.In the DE 696 03 969 T2 a bar doctor holder is described, which is designed as a housing, and in which a cylindrical bar blade is inserted.

Die DE 196 31 913 A1 beschreibt ferner eine Vorrichtung zum direkten oder indirekten, einseitigen oder beidseitigen Auftragen eines Mediums auf eine laufende Materialbahn. Des Weiteren sind Dosiersysteme bekannt, wie sie beispielsweise in der DE 196 26 580 A1 beschrieben werden.The DE 196 31 913 A1 further describes a device for direct or indirect, single-sided or two-sided application of a medium to a moving material web. Furthermore, metering systems are known, as for example in the DE 196 26 580 A1 to be discribed.

Des Weiteren offenbart die DE 296 21876 U1 ein Rakelelement, das während des Betriebes in bestimmten Winkelstellungen fixiert werden kann und mindestens zwei Wirkflächen aufweist.Furthermore, the DE 296 21876 U1 a doctor element, which can be fixed during operation in certain angular positions and has at least two active surfaces.

Bei niedrigen Druck- bzw. Banddurchlaufgeschwindigkeiten arbeiten diese Vorrichtungen relativ gut. Nachteilig ist aber, dass der Verschleiß der Dosiervorrichtung, hier die aus Gummi- und aus gummiähnlichem Material bestehenden Lippen, bei schnell oder sehr schnell laufenden Maschinen unverhältnismäßig hoch ist. Zudem lässt sich nicht jede Art Medium mit derartigen Lippen auftragen.at low printing or tape throughput speeds work this Devices relatively good. The disadvantage, however, is that the wear of the metering device, here the rubber and made of rubber-like material existing lips, in fast or very fast running machines disproportionately high is. In addition, leaves Do not apply every kind of medium with such lips.

Es ist daher Aufgabe der vorliegenden Erfindung, die Standzeit der Aufbringvorrichtung zu erhöhen um damit die Betriebskosten für schnell laufende Druckmaschinen zu reduzieren und deren Wirtschaftlichkeit zu verbessern.It is therefore an object of the present invention, the service life of To increase applicator to thus the operating costs for to reduce fast-moving printing presses and their cost-effectiveness improve.

Diese Aufgabe wird durch die in dem Patentanspruch 1 angegebenen Merkmale gelöst. Vorteilhafte Ausführungsformen der Erfindung sind Gegenstand der Unteransprüche.These The object is achieved by the features specified in the patent claim 1 solved. Advantageous embodiments The invention are the subject of the dependent claims.

Insbesondere besteht die erfindungsgemäße Lösung darin, dass die Rakelstange ein kaltgezogenes Profilrohr ist, das mindestens eine angeformte Lippe aufweist. Das Profilrohr besteht vorzugsweise aus Stahl, der verschleißfester als bisher verwendeter Kunststoff ist. Insbesondere erlaubt er höhere Arbeitsgeschwindigkeiten und Betriebstemperaturen.Especially if the solution according to the invention is that the squeegee bar is a cold drawn profile tube that at least has a molded lip. The profile tube is preferably made of steel, the more wear-resistant is as previously used plastic. In particular, it allows higher working speeds and operating temperatures.

Dabei sehen Ausführungen vor, dass die Lippen flossenartig ausgebildet sind und eine Steigung aufweisen, die direkt am äußeren Umfang des Profilrohres beginnt und dann in einer steil abfallenden Abrisskante endet.there see finishes before, that the lips are formed like a fin and a slope which are directly on the outer circumference begins the profile tube and then ends in a steep drop-off edge.

Durch das Ausbilden von zwei oder mehr Lippen auf dem Umfang der Rakelstange können die Herstellungs- und Betriebskosten reduziert und die Standzeit des Bauteils um die Anzahl der angeformten Lippen entsprechend erhöht werden.By forming two or more lips on the circumference of the doctor bar can reduces the manufacturing and operating costs and the service life of the component to the number of molded lips are increased accordingly.

Die Erfindung wird im Folgenden anhand beispielhafter Ausführungsformen unter Bezugnahme auf die beigefügten Zeichnungen näher erläutert. Dargestellt sind hier zwar Profilrohre mit kreisrundem Ausgangsquerschnitt, es können aber auch beliebige Querschnittsgeometrien für das Profilrohr verwendet werden, falls die jeweiligen Anwendungen dies erfordern.The Invention will be described below by way of exemplary embodiments with reference to the attached Drawings closer explained. Although profile tubes with a circular output cross-section are shown here, it can but also any cross-sectional geometries used for the profile tube if required by the respective applications.

Die 1 zeigt die erfindungsgemäße Rakelstange, die als kaltgezogenes Profilrohr 10 aus einem Stahlwerkstoff besteht.The 1 shows the doctor bar according to the invention, as a cold-drawn profile tube 10 made of a steel material.

Das Profilrohr 10 ist am Außenumfang 12 mit zwei Lippen 11 versehen, die gegenüber liegend angeordnet und flossenartig mit einer relativ flachen Steigung 13 ausgebildet sind und eine relativ steil abfallenden Abrisskanten 14 aufweisen. Der Innendurchmesser 16 des Profilrohrs 10 ist entweder rund oder dem Außenprofil 17 angenähert.The profile tube 10 is on the outer circumference 12 with two lips 11 provided, which are arranged opposite and fin-like with a relatively flat slope 13 are formed and a relatively steep drop-off edges 14 exhibit. The inner diameter 16 of the profile tube 10 is either round or the outer profile 17 approximated.

Auf den Lippen 11 kann eine Beschichtung 15 aufgebracht sein. Die Beschichtung 15 ist hochfest und minimiert die Reibung gegenüber schnell laufenden Papier- und Kartonbahnen, auf die die flüssigen oder viskosen Medien aufzubringen sind.On the lips 11 can be a coating 15 be upset. The coating 15 is high strength and minimizes friction against high speed paper and board webs on which liquid or viscous media are to be applied.

Die Beschichtung 15 besteht beispielsweise aus einer DLC-Schicht (DiamondLikeCarbon), die ggf. eine polierte Profiloberfläche aufweist.The coating 15 consists for example of a DLC layer (DiamondLikeCarbon), which may have a polished profile surface.

Diese DLC-Beschichtungen ist eine hochfeste, verschleiß- und reibungsarme Beschichtung auf Kohlenstoffbasis, die zu einer weiteren Erhöhung der Verschleißfestigkeit und Kostenreduzierung führt.These DLC coatings is a high-strength, low-wear and low-friction coating carbon-based, leading to a further increase in wear resistance and cost reduction leads.

Grundsätzlich ist es auch möglich ein unbeschichtetes Rohr oder auch andere Beschichtungssysteme wie TiN-, TiAlN-, TiC oder MnS-Schichtsysteme zu verwenden.Basically it also possible an uncoated pipe or other coating systems such as TiN, TiAlN, TiC or MnS layer systems to use.

Die 2 zeigt ein anderes Ausführungsbeispiel einer Rakelstange, wobei hier vier Lippen 11 angeordnet sind, bei denen sich die Abrisskanten 14 von zwei Lippen 11 aufeinander zuweisend mit Abstand gegenüber liegen.The 2 shows another embodiment of a doctor bar, here four lips 11 are arranged, in which the tear-off edges 14 of two lips 11 facing each other at a distance from each other.

In 3 ist ein weiteres Ausführungsbeispiel dargestellt, bei dem die Lippen 11 asymmetrisch am Umfang des Profilrohres 10 angeordnet sind. Der Vorteil dieser Anordnung liegt insbesondere in einer Drallverminderung des Profilrohres 10 bei der Herstellung. Bezugszeichenliste Nr. Bezeichnung 10 Profilrohr 11 Lippe 12 Außenumfang 13 Steigung 14 Abrisskante 15 Beschichtung 16 Innendurchmesser 17 Außenprofil In 3 is shown another embodiment in which the lips 11 asymmetrical on the circumference of the profile tube 10 are arranged. The advantage of this arrangement is in particular in a swirl reduction of the profile tube 10 in the preparation of. LIST OF REFERENCE NUMBERS No. description 10 section tube 11 lip 12 outer periphery 13 pitch 14 tear-off edge 15 coating 16 Inner diameter 17 outer profile

Claims (13)

Rakelstange für Dosiersysteme zum Verteilen und Abstreifen eines flüssigen oder viskosen Mediums auf laufenden Materialbahnen, insbesondere Papier- und Kartonbahnen, bei denen das flüssige oder viskose Medium im Überschuss aufgetragen und mittels der Rakelstange auf das gewünschte Strichgewicht abgerakelt wird, dadurch gekennzeichnet, dass die Rakelstange ein kaltgezogenes Profilrohr (10) ist, das an seinem Außenumfang (12) mit mindestens einer achsparallel angeformten Lippe (11) versehen ist.Doctor blade for metering systems for distributing and stripping a liquid or viscous medium on moving webs, especially paper and board webs, in which the liquid or viscous medium is applied in excess and doctored off by means of the doctor bar to the desired coating weight, characterized in that the doctor bar a cold-drawn profile tube ( 10 ), which is on its outer periphery ( 12 ) with at least one axially parallel molded lip ( 11 ) is provided. Rakelstange nach Anspruch 1, dadurch gekennzeichnet, dass die Lippe (11) eine sich vom Außenumfang (12) des Rohres (10) zunehmend vergrößernde Dicke aufweist, die in eine Abrisskante (14) übergeht, die nahezu radial auf den Außenumfang (12) des Rohres (10) zurückgeht.Doctor rod according to claim 1, characterized in that the lip ( 11 ) one from the outer periphery ( 12 ) of the pipe ( 10 ) has increasingly increasing thickness, which in a trailing edge ( 14 ), which is almost radially on the outer circumference ( 12 ) of the pipe ( 10 ) goes back. Rakelstange nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, dass über den Außenumfang (12) verteilt zwei Lippen (11) vorgesehen sind, wobei deren Abrisskanten (14) sich bezogen auf den Außenumfang (12) gegenüber liegen.Doctor rod according to claims 1 and 2, characterized in that over the outer circumference ( 12 ) distributes two lips ( 11 ) are provided, wherein the demolition edges ( 14 ) relative to the outer circumference ( 12 ) are opposite. Rakelstange nach Anspruch 1 und 2, dadurch gekennzeichnet, dass über den Außenumfang (12) verteilt vier Lippen (11) vorgesehen sind, von denen jeweils zwei sich gegenüber liegende Abrisskanten (14) aufweisen.Doctor rod according to claim 1 and 2, characterized in that over the outer circumference ( 12 ) distributes four lips ( 11 ) are provided, of which in each case two mutually opposite separation edges ( 14 ) exhibit. Rakelstange nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Lippen (11) symmetrisch zueinander an dem Profilrohr (10) angeordnet sind.Doctor rod according to one of claims 1 to 4, characterized in that the lips ( 11 ) symmetrical to each other on the profile tube ( 10 ) are arranged. Rakelstange nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Lippen (11) asymmetrisch an dem Profilrohr (10) angeordnet sind.Doctor rod according to one of claims 1 to 4, characterized in that the lips ( 11 asym metric to the profile tube ( 10 ) are arranged. Rakelstange nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass auf der Oberfläche der Lippe (11) eine hochfeste, die Reibung mindernde Schicht (15) aufgebracht ist.Doctor rod according to one of the preceding claims, characterized in that on the surface of the lip ( 11 ) a high-strength, friction-reducing layer ( 15 ) is applied. Rakelstange nach Anspruch 7, dadurch gekennzeichnet, dass die hochfeste, die Reibung mindernde Schicht (15) eine auf Kohlenstoff basierende DLC-Beschichtung ist.Doctor rod according to claim 7, characterized in that the high-strength, the friction-reducing layer ( 15 ) is a carbon-based DLC coating. Rakelstange nach Anspruch 7, dadurch gekennzeichnet, dass die hochfeste Schicht (15) aus TiN, TiAlN oder TiC besteht.Doctor rod according to claim 7, characterized in that the high-strength layer ( 15 ) consists of TiN, TiAlN or TiC. Rakelstange nach Anspruch 7, dadurch gekennzeichnet, dass die Reibung mindernde Schicht (15) aus MnS besteht.Doctor rod according to claim 7, characterized in that the friction-reducing layer ( 15 ) consists of MnS. Rakelstange nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die Anzahl der Lippen (11) in Abhängigkeit von der Umlaufgeschwindigkeit der zu beschichtenden Papier- und Kartonbahnen und von der auf die Papier- und Kartonbahnen aufzubringenden Schichtdicke festgelegt ist.Doctor rod according to one of claims 1 to 10, characterized in that the number of lips ( 11 ) is determined as a function of the rotational speed of the paper and board webs to be coated and of the layer thickness to be applied to the paper and board webs. Rakelstange nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass der Innendurchmesser (16) des Profilrohres (10) im Wesentlichen kreisrund ist.Doctor rod according to one of claims 1 to 11, characterized in that the inner diameter ( 16 ) of the profile tube ( 10 ) is substantially circular. Rakelstange nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass der Innendurchmesser (16) des Profilrohres (10) im Wesentlichen wie das Außenprofil ausgebildet ist.Doctor rod according to one of claims 1 to 11, characterized in that the inner diameter ( 16 ) of the profile tube ( 10 ) is formed substantially like the outer profile.
DE102009050917A 2009-10-23 2009-10-23 Doctor blade of a dosing system for distributing and stripping a fluid or viscous medium on running material web such as paper or cardboard web, where the fluid or viscous medium is applied in excess and is removed by the doctor blade Expired - Fee Related DE102009050917B3 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE102009050917A DE102009050917B3 (en) 2009-10-23 2009-10-23 Doctor blade of a dosing system for distributing and stripping a fluid or viscous medium on running material web such as paper or cardboard web, where the fluid or viscous medium is applied in excess and is removed by the doctor blade
EP20100075712 EP2314382A3 (en) 2009-10-23 2010-10-14 Doctor rod for metering systems for distributing and stripping a fluid or viscous medium on moving strips of material
US12/910,135 US20110265712A1 (en) 2009-10-23 2010-10-22 Metering rod for metering systems for dispersing and wiping off a liquid or viscous medium on moving material webs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009050917A DE102009050917B3 (en) 2009-10-23 2009-10-23 Doctor blade of a dosing system for distributing and stripping a fluid or viscous medium on running material web such as paper or cardboard web, where the fluid or viscous medium is applied in excess and is removed by the doctor blade

Publications (1)

Publication Number Publication Date
DE102009050917B3 true DE102009050917B3 (en) 2010-10-07

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DE102009050917A Expired - Fee Related DE102009050917B3 (en) 2009-10-23 2009-10-23 Doctor blade of a dosing system for distributing and stripping a fluid or viscous medium on running material web such as paper or cardboard web, where the fluid or viscous medium is applied in excess and is removed by the doctor blade

Country Status (3)

Country Link
US (1) US20110265712A1 (en)
EP (1) EP2314382A3 (en)
DE (1) DE102009050917B3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE535994C2 (en) * 2011-03-03 2013-03-19 Mattssonfoeretagen I Uddevalla Ab Method and apparatus for dosing and coating

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DE19631913A1 (en) * 1996-08-07 1998-02-19 Voith Sulzer Papiermasch Gmbh Web coating applicator for coating ink or dye to web of paper, etc.
DE69603969T2 (en) * 1995-07-24 2000-03-09 Beloit Technologies Inc ROD HOLDER WITH SEPARATELY ADJUSTABLE CONTACT ELEMENTS FOR ROD DOSING
JP2002028549A (en) * 2000-07-13 2002-01-29 Hirano Tecseed Co Ltd Roller for flocking fabric and coating apparatus using the same
US20050100673A1 (en) * 2002-05-22 2005-05-12 Ulrich Schoof Method for the surface treatment of a doctor element

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ATE1769T1 (en) * 1979-12-03 1982-11-15 Zanders Feinpapiere Ag DEVICE AND METHOD FOR COATING RUNNING WEBS OF, FOR EXAMPLE, PAPER OR CARDBOARD.
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FI106139B (en) 1999-03-26 2000-11-30 Valmet Corp Stavskavare
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Publication number Priority date Publication date Assignee Title
JPS60166064A (en) * 1984-02-08 1985-08-29 Yokohama Rubber Co Ltd:The Impregnation device
DE69603969T2 (en) * 1995-07-24 2000-03-09 Beloit Technologies Inc ROD HOLDER WITH SEPARATELY ADJUSTABLE CONTACT ELEMENTS FOR ROD DOSING
DE19631913A1 (en) * 1996-08-07 1998-02-19 Voith Sulzer Papiermasch Gmbh Web coating applicator for coating ink or dye to web of paper, etc.
DE29621876U1 (en) * 1996-12-17 1997-02-13 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Doctor device
JP2002028549A (en) * 2000-07-13 2002-01-29 Hirano Tecseed Co Ltd Roller for flocking fabric and coating apparatus using the same
US20050100673A1 (en) * 2002-05-22 2005-05-12 Ulrich Schoof Method for the surface treatment of a doctor element

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US20110265712A1 (en) 2011-11-03
EP2314382A3 (en) 2013-09-11
EP2314382A2 (en) 2011-04-27

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